Eight years after the Notorious B.I.G.'s death, Bad Boy will release Duets: The Final Chapter, a collection of new songs that pair the rapper's vocals with Eminem, Missy Elliott, Jay-Z and others. "This is going to go down in history as Biggie's last album," says Sean "Diddy" Combs, who executive-produced Duets along with B.I.G.'s mom, Voletta Wallace. While some of the slain rapper's vocals on Duets are rehashed from Ready to Die, Life After Death and Born Again, the disc includes a number of unearthed gems. "Tupac [Shakur] was in the studio rapping for a long time," Diddy says, noting Shakur's extensive posthumous catalog. "Biggie's career was very, very short. There will probably be a greatest-hits album, but otherwise, this is it."

Highlights include "Whatchu Want" -- a hard-driving banger that pairs Jay-Z and Biggie for the first time since "Brooklyn's Finest," in 1996 -- and "Hold Ya Head," which matches Biggie's "Suicidal Thoughts" ("Crime after crime, from drugs to extortion/I know my mother wished she got a fuckin' abortion") with Bob Marley's chorus from "Johnny Was" ("Woman hold her head and cry/'Cause her son had been shot down in the street and died"). Surprisingly, considering the song's content, Voletta Wallace helped secure the rights to "Johnny Was" and says "Hold Ya Head" is one of her favorite songs on Duets. "I always wanted my son to do stuff with Bob Marley," says Wallace, a native Jamaican. "It's very dark, but I like it."